function se (name) {
    var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
    var r = window.location.search.substr(1).match(reg);
    if(r!=null)return  decodeURI(r[2]); return null;
}

var code = se('code')
var state = se('state')
$.ajax({
    url: '/api/wechat_login',
    data: {
        code: code
    },
    type: 'post',
    dataType: 'json',
    success:function (res) {
        console.log(res)
    }
})